diff --git a/app/views/files/_upload_course_files.erb b/app/views/files/_upload_course_files.erb
index 133b8b4d6..0a35c783c 100644
--- a/app/views/files/_upload_course_files.erb
+++ b/app/views/files/_upload_course_files.erb
@@ -25,7 +25,7 @@
           <div class="mb5">
             <label class="fl c_dark f14" style="margin-top: 4px;">附件描述：</label>
             <div class="fl">
-              <input  type="text" name="description"  placeholder="文件描述" class="fl W120 ">
+              <input  type="text" name="description"  placeholder="文件描述" class="InputBox fl W160">
             </div>
             <div class="cl"></div>
           </div>